New computer models predict U.S. crop harvests will be adversely affected by climate change. Scientists found for each additional day with temperatures above 86 degrees Fahrenheit, maize and soybean yields are reduced by 5 percent.

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New computer models predict U.S. crop harvests will be adversely affected by climate change. Scientists found for each additional day with temperatures above 86 degrees Fahrenheit, maize and soybean yields are reduced by 5 percent.